Correct
恒等
/ héngděng /
Strokes
Definition
identity ≡ (math., logic)/identical
Example
As an Adjective
identical; identically equal
1
Héng
恒
děng
等
dàihuàn
代换
identical/identity substitution
2
Héng
恒
děng
等
biǎoshì
表示
identity representation
3
Héng
恒
děng
等
biànhuàn
变换
identical transformation